Gear-roughing machine.



'P. L. EBERHARDT al w.v F. zIMMr-.RMANN.y

GEAR ROUGHING'MACHINE. APPL'xoATIoN FILED Armfzz, mo.l

@imn-lla. s*

VENT R5- W ma JZ ATTORNEY- 50 ...indexing device'land locking arrangement "UNITED STATES EATENT ff FREDERICK L.E:BENHAEDT AND WILLIAM E, ZIMMEEMANN, 0E NEWARK,` NEW'IEEF sEY, AssIGNoRs ro GoULD a EBERHARD'I, or NEWARK, NEW JERSEY, A conrona- TION 0F NEW J'ERSEY.

GEARROUG-HING MACHINE.

yTo all whom it may concern:

f Be it known that we, FREDERICK L. EBER-v HARDT and WILLIAM F. ZrMMnnrrANn,citizens of the United States, and resideilts of the city of' Newark, inthe County of Essex and State of New Jersey, have invented certain new and useful Improvements` 1n Gear- 'RoughingffMachinesQ andwe do hereby d e' clare the following specification, taken in Vconnection with the drawings forming part of thesame, to be a full, clear, and exact description of the principle o f said invention andthe best mode in which we have contemplated applying that principle, so as to distinguish it from other inventions.

The invention 'relates primarily to a shaping machine arranged to rapidly'rough -out spur and bevel gears preparatory to finishing them on a generating machine and more particularly to a machine arranged to rap idly rough out bevel gears provided with a hub projecting toward the apex of the gear, but is not limited to such a gear;v f

y The primary object of this invention is lto provide an automatic arrangement in combination with parts of a shaping machine, to rapidly rough out thespaces in antonio` bile-bevel' gears, particularly those which cannot be cut with a rotary cutter and which I out the gears and not to formthe contour 'have a hub projecting beyond the face of` thereof, The simplicity and rigidity of the present device has enabled the 'roughing out of' gearsl to be accomplished in about l'one fourth to one fifth of the time heretofore consumed;not only has the time of production been materially reduced, but the cost of -the device has been practically-.lowered yto i' one half of thatofia generator;

Anotherfeatur relates to the automatic f-fr. the gearqbhnk, whereby the gears are tion during the cut.

spacedxafter eilch'fcut'and locked in posi- Specication of Letters Patent. Patented D30, 24, 1912, l Application filed August 22, 1310. Serial No. 518,403.

Another feature relatesto the automatic feeding device for the cutting tool, whereby the tool is fed to the properdepth of tooth and then 'automatically disconnected 'at a predetermined time,"sa id feed being Iintermittent and taking place atv each return stroke of the cutting tool. f

Still another feature relates to the chip cleaning device whereby the .chips, which crowd in the groove between theteethand hub of the gear, are clearedaway` toprevent the jamming of the tool against these-,chips and consequently causing the stoppagefof the entire device, due to v`a practically solid abutment beinginterposed between the .hub

of t-he gear and the cutting tool.

The invention comprises a reciprocating tool, a work holder, a means to index said work holder after each cutting movement of said tool, a meansk to lock said Work,

holder during vthe cutting movement, a-

means to feed said Vtool after each cutting movement, an automatic stop therefor to disengage said feed at a predeterminedtirne,

and. a chip cleaning device to prevent the,k

the following description thereof.

The novelty of the invention is more particularly pointed out to said description. u

Referring to the drawings Figure 1, is a side elevation of a shaping Vmachine with the work 'support and cutting tool feed device partly in' section. Fig. 2, is a plan view of the cutting tool slide or ram partlyv in sec. tion, to show .the feed mechanism for the tools. A Fig. 3 is a Sectional view ofthetool in the claims `Vannexed slide at Y Y1 andZ Z1 ofFigjvlfand also" illustrates the reciprocating mechanism for the tool slide partly 'in section. Fig. 4 is a. plan view of the work'support, looking in the direction'of the workspindlelaxes A, B

of Fig. 1. Fig. 5 is a sectional View of the Work support at X X, of Fig. 1. Fig. 6, is

a plan view of the loc-king device for the work spindle and Fig. 7 is a side sectional view of said Work spindle locking device.

Referring now particularly to Fig. 1, the frame, 1 isprovided With angular ways for the reciprocating tool slide 2 and is also arranged with a bearing 3 (see Fig. 3) in'. which a driving or bull gear 4 is rotatably mounted. The gear 4 is provided with a crank pin 5 set suliciently off center to give the tool slide 2 the proper length of stroke. A square crank pin block 6 is mounted on said crank pin 5 and held thereto by the flange 7 and arranged to operate in the lever 8. .Said lever 8 is hinged in theusual way to a lever block 9 clamped to the tool slide 2 by means of the handle 1() and cap 11. The parts thus described are characteristic of the familiar crank shaping machine and consequently various unimportant details have been omitted.

A knee or'table 12, which is secured to the front end of the frame 1 bythe strap 13 and screws 14, has a Work support 15 secured thereon, in which two revoluble Work spindles 16 are mounted to carry the gear-blanks 17. The Work spindles 16 are arranged at an angle, in said Work support 15, sutllcient to bring the cutting angle of the gear blanks 17 parallel `to the path of the cutting tools 18. A helical gear 19 is secured to the lower end of each of said work spindles-16 together With a locking plate 20, the latter being provided with a series of slots 21, arranged slightly oft center and of a number corresponding with the number of teeth to be cut in the gear blanks 17.

The helical gears 19 are driven by individual helical pinions 22 secured to the indexing shaft`23, which is rotatably mounted in the Work support 15 (see Fig. A lantern gear 24 is secured to one end of the in- `with the bull wheel 4 'driving shaft 'flexing Shaft 23 andprovideduith a number of rungs or pins 25, equal to, or a factor of the number of slots in the locking plate 20. In the particular arrangement as shown, the number of rungs is equal to one half of the number of slots in the plate 20. The lantern gear 24 is intermittently engaged by each of the lobes on the lobed wheel 26 to index the Work spindles 16 intermittently between the successive cutting strokes of the tools 18.

The four-lobed Wheel 26 is rotated continuously by the locking shaft 27, which re.- ceives its motion through the bevel gear 28 secured thereto and rotated by the bevel .pinion 29 secured tothe driving. shaft 30.

A bevel pinion 31 is secured to, and rotates and 'engages with a bevel gear 32, secured to and rotating said 30. The connect-ions between the bull-Wheel 4 and the Work spindles 16 are arranged to maintain the synchronism between the relative movements of the reciprocating tools 18 and gear blanks 17.

Two locking members 33 are secured to the locking shaft 27 and provided with a s eries of lobes corresponding in number to those on the lobed wheel 26. The lobes on the locking members 33 are arranged to engage the slots 21 in the locking plate 20, to prevent the work spindles 16 from rotating during the cutting action of the tools, and are disengaged from the plate during the indexing movement.

The ram 2.is provided at one end thereof, with an adjustable tool slide 34, in Which the clapper 35 is pivoted at 36. The tools 18 are secured to the clapper 35 by the straps 37 and bolts 38. The tool slide 34, carrying the tools 18, is adjusted vertically by means of a screw 39 operated by the handle 40. The screw 39 extends througl'rthe round end of the ram 2 and is fitted to a tapped portion therein. The tools are also adjusted or fed automatically by a power feed arrangement provided to intermittently feed the tools in a downward direction during the return or non-cutting movement of said tools. This power feed device consists of a bevel' gear 41 mounted in the ram 2 and arranged to allow the screw 39 to pass through an opening therein. A driving connection is maintained between the Iscrew 39 and gear 41, bythe engagementof the key 42, Secured to said gear with a spline in the screw. The bevel gear 41 engages with and is rotated by a bevel pinion 43 secured to the feed shaft 44. The feed shaft 44 is mounted in the ram at right angles to the screw 39 and is provided with a worm .wheel 45 loosely mounted therein, so arranged as to be engaged by the sliding clutch 46, also mounted on said feed shaft 44, but keyed thereto. The worm wheel 45 is rotated by the Worm 47 mounted transversely in the ram 2 .and having a ratchet gear 4S secured to the outer' end thereof. A rocking lever 50 is loosely mounted on the worm shaft 47, and adjacent to theV ratchet gear 48, and is provided with a ratchet pawl 49 there-in, to engage said ratchet gear 43.

The lower end 51 of the rocking lever 50, is arranged to come in Contact with the sliding abutment 52 which is adjustable on a guideivay 53 secured to the frame l. A screw handle 54 clamps the sliding abutment to its guidcway 53. AA spring 55 lsecured to the rocking lever 50 and the raml 2 to iusure the returnmovement of said lever 51, after having been rocked by the engagement thereof with. the abutment 52.

Means for disengaging the feed of-the tools 18 is also provided and comprises a lever 56 secured to a shaft 57 arranged to rock in the ram 2, and engaging the'peripheral groove in the clutch 46. A lever 58 is secured to the outer end of said rock shaft 57 and has a trip bar or hook 59 attached to one end thereof. trip bar'or hook 59 is "guided at its r end by the block 60 and is provided with a recess or hook to en- 4gage the adjustable block 61. The lever 58 is constantly forced in one direction, by the spring 62 attached thereto, to disengage the feedclutclies and discontinue the automatic l feed, but this spring can only aet when the.) hook 59 is free from the block 61. The adjustable block 6l is mounted on the screw 63,' held at each end in the bearings 64. Two

adjusting nuts 65 are provided on the screw GS'and on eachside of the adjustable block 6l 'to adjust said block 6l for the proper depthl of tooth to be cut inthe `gear and to 'loelg/saiiie in suoli adjusted position.' A spr/ing 66 arranged in the guide block 60 issprovided to press the hook 59 into engagementi with the adjustable block 61 and still allow'the said hook to be engaged or disengaged manually by a lateral movement toward or away from said block by means of the handle 67 provided on said hook.

A device to clean the chips from out of the groove formed between. the projecting' hub of the gear and the teeth, is provided so as to prevent the chips from forming a solid abutment in the path of the cutting. tools andthereby impairthe operation of the entire device.

' Each gear blanky to be cut is provided with a chip lever 68 fulcrumed'at 69 and one end thereof arifanged to fit the groove in the gear blank against which he chips are pressed .and then directed into the chip pan. The

other ends 4of the ehiplevers 68 are connected bya rod 70 WhiChis forced upwardly by ay spring,r pressed plunger 7l' so as to press the chip cleaning' into the gear groove. 'Aj handle 7'2 is attached'to the springr pressed plunger 7l whereby the tension on the chip levers 68 may be released and 1said levers swing out `of ythe groove in the geariblanlc and allow said .blanks to be removed. This feature is 'very esseiitialto the succcsful operation `of the machine so as to prevent the tools from 'jammingaga'inst tl'ie'liub ofthe gear by reason loithe chips ha v-in-g'- been bloeledbetwceh said' hiili'\i1nd tools.

Having described the in'voni'gioi ,in\d'`tail`, l x escriben "The gear blai'iksare secured .'t'o' the spin.-`

' dles and the -tools adjusted ".t'o'i'- the proper length oij'trolce. `The.t.ools are then-fed bythe hand i heel until they just touch the nppcrmost. portion of the gear face.' The adjnstalile block then-set for thepropei depth and theA automaticd engaged and the chip cleaners put in position. tools niovdii forward for the cnt, the spindles' .3f-i and on the riarare locked by thecaniward or non-cutting stroke they are unlocked and indexed one space by the cam 26. This is repeated ateach stroke. As the tools reach their rearward position, the ratchet lever 51 strikes the abutment 52 and feeds the tools deeper into the work and at each moved s uiiiciently to release the hook or trip bar and has allowed the feed tolbe disconnected by the spring' 62, whereupon the tools a.re raised manually and new gear blanks substituted.

sire to secure by Letters Patent: j l. The ,combination with a tool, of means to reciprocate same, a work holder, an index ing` shaft synchronically connected to said reciprocating mechanism, a: lantern gear. se-

reciprocating mechanism, an 'intermittently index and ,locking shafts to index said work yholder and a locking device 'to lock said val comprisinga notched plate secured to said work holder and a ii'iiilti-lo'bed locking' ing shaft.

,o to reciprocate saine, a work holder, an index shaft connected to said 'work holder, a locking shafti'otatahlyconnected to saidrecipy roeating mechanism, a lantern gear secured to and rotatable with said indexing shaft, a `multi-lobed cam securedl to and rotatable withksaidlockingsliazit to intermittently rotate said flalnterii gein; to indexsaid work dioliler, 'and a. .tasking deviceseoinl,rising a `mitglied sec'iiieiLip siij(L\v(ii l\j'liolilcr `and Yagnaultiflobcd. locking plate secured to `andd rotiiting with said lock-ing shaft to lock rotations saidfiindex shaft. l

liaiciiui'nei nmcni'iannr; .XMHPIAM' F.' ZIMMER-MANN,- `Witnessesy I i A. FivliiA lhsinnminrr,

" I-lii'eo'W. JacoiisoN.

Having described our invention and its' mode of operation we claim as new and deshaftconnected to said Work holder, a lock-4 cnred to andA rotatable with said index shaft,

during the non-indei- .2. The combination with a tool of means 3 `ing shaft synchronically connected ,to said operable'indexing mechanism between saidr work holder during' the non-'indexing intei'- The combination with 'a tool oi- ,means Vsaid work 'holder between.. the intermittent stroke until the adjustable block has been ido plate secured to and rotating with said locki-A l iie 

